Nondrip valve



Patented July 23, 1929.

UNITED STATES PATENT ortica4 l ALBERT sLArEN, vor MINNEAPOLIS, Mmnnso'rn.

NONDRIP VALVE.

i originaiappucation med March' 5, 1925, serial No. 13,382.y Divided and this application filed october 31, 1927. seria1 No. 230,064.

My present invention relates to a valve and more particularly to a non-drip valve intended for general use, but especially adapted for use in connection with a cream-dispensing device.

The present application is a division of my co-pending application entitled Cream dispensing device, filed March 5, 1925, under Serial Number 13,382 and allowed May 2, 1927, patented November 29, 1927. No. 1,650,806.

In the accompanying drawings, which. illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: 1

Fig. 1 isla right side elevation of a, cream measuring and valve-controlling assembly removed from a cream-dispensing device;

Fig. 2 is a plan view ofthe same;

Fig. 3 `is a view partly'in right side eleva tion and partly in central lvertical section taken on the line 3-3 of Fig. 2, with some parts shownin different positions by means ofv broken lines and further illustrating the supply tank of the cream-dispensing device; Fig. 4 is a view principally in section taken on the line 4-4 of Fig. 2; and Fig. 5 is a fragmentary perspective view of one of the guide arms and associated parts.

The numeral 4 indicates a fragment of a cream supply tank from which cream-may bedrawn through a cup-like valve casing 5 mounted in a depression in the bottom of said tank and having a plurality of discharge ports 6. A valve 7 mounted in a seat in the top of the valve casing 5 normally closes the discharge ports 6 leading from the tank 4.

The valve 7 is provided with a depending stem 8 which works in a bore-like passage in the bottom of thevalve casing 5. Said valve 7 is arranged to close withthe cream pressure in the tank 4 and a leaf spring 9 is provided for yieldingly closing said valve.

At the front of the supply tank4 is a creammeasuring and valve-controlling assembly that includes a receptacle 10 `having a creammeasuring compartment 11. A cover, not shown, will be provided for the receptacle 10. Formed with the receptacle 10 is an inclined trough 12 which extends below the supply tank 4 and under the valve casing 5. This trough 12 is detachably applied to the bottom of the tank 4 and arranged to receive cream from the supply tank 4 through the discharge ports 6 when the valve 7 is open and convey the same into the measuring com closed,` is in the same partment 11. The receptacle 10 at its top is circumferentially expanded at 13 and its lower end is open and has mounted therein a sleevelike member having a port 14. The walls of the port 14 at its upper end is beveled to the walls of the compartment 11 and the lower end of the port is contracted and its walls beveled to form a valve seat 15.

A heavy piston-like non-drip valve 16 is adapted to enter the port 14'and engage its' walls and has a beveled lower end portion 17 which is adapted to directly rest on the seat 15 when the valve 16 is closed and seals the port V14. The under side of the valve 16 is recessed and terminates in a depending sharp annularedge 18 which, when-saidfvalve is plane with the sharp annular edge formed between the lower' end' of the valve seat 15 and the'exterior wall of' the sleeve-like member. VRigidlyl secured tov the valve16 at the axis thereofis an up? standing valve stem 19- the upper endv of' which -is pivoted to a pair of converging guide arms 20 pivoted at 21 to the sides of the trough 12 for vertical swinging movement.

To open the valve 16 by means of a cup. not shown, placed under vthe port 14 to receive the measured cream from the compartment 11, when the valve 16 is opened, there is provided a horizontal cup-engaging metal plate 22 located just back of the receptacle 10 and under the trough 12. This cup-engaging plate 22 has a pair of laterally spaced upright stems 23 slidably mounted in a pair of guido tubes 24 which extend into the trough 12 through the bottoni thereof. On the upper ends of the stems 23 are bifurcated heads 25 through which the arms 20 extend. From the heads '25 the cup-engaging plate 22 is supported at the proper height in respect to the receptacle 10. By reference to Fig. 3 it is important tonote thatthere is clearance between the guide tubes 24 and the heads 25 so that the valve 16 will not be held'from its Seat'15 when moved to its closed position.

Secured to the under side of the cup-'en'-` gaging plate 22 is a cushion mat 26 of rubber or any other suitable material which prevents the rim of the cup from coming in direct. contact with said plate which might break or chip the same. A leaf spring 27 on the one side of the trough 12 engages the'adjacent guide arm 2O and yieldingly holds the valve 16 closed.

To open VthevalVeT-to llthecompartment 11 With-cream from-.the supply tank lhithere 1s 12. This crank 29 has on one of its ends outward of the trough 12 a long arm 30, the free rend of which extends between {the'zside of the trough 12 and an anchor plate 31 rigidly secured to said trough. The arm 30 is adjustably secured y.to the anchor plate 31' by alset screw 32 which 4has screw-'threaded engagement Vwith said arma-nd Works ina segmental slot-33 inthe ancho'r plate 31. This screw'32, :When tightened, frictionally clamps the arm BOionto the anchor plate 31 and holds' the same :Where set. The short or inner lend of the lever 28 extends under the headed lower endfot the valve 'stem 8 for engagement therewith to open said valve, as Will presently appear, r ,Y -f

,The lever 28 is operatcdby a-loat 84 in the cream-measuring compartment 11 and isprovided .With an axial passage through which the'valve :stem 19 looselyprojects. 'The long or outer end ofv the lever 28 is bifurcated andconnected'to'the tioat 34 by a pair-.of-diametrically opposite upstanding. .apertured lugs 35. secured Ito, saidv Heat and through.' which the prongs of the,bifurcated'end'of-the leverv 28 loosely extendf A guide sleeve S6-for the valvestem 19 is mounted .in the axial passage' inthe ,float 34. y'When themeasurin'g com-- partmentll is empty'and the valve 16 closed1 the loat34 rests on the top of saidfvalveiand holds the lever 28 in position to hold the valve 7 open for theidischarge of cream from the supply-tank 4 to the trough 12 Where the .Same is conveyedto-said compartment.

Operation,

vice maybe brieliy-described 'as follows: Be-

fore filling ,the supply tank with cream, the

' creamfmeasuring and valve-controlling aS`-' semblyis detached'from the device so that the oatactuated lever 28 will not` hold the valve .7.1open.l After the tank is filled with cream, the Creammeasuring and the valvecontrolling assembly is replaced and the float 34 acting on the lever 28 Will cause said lever to open .the valve 7 and allow cream to escape from-the supply, tank 4 through the pjorts 6 intothe trough 12.1vhere the same isfconveyed to :themeasuringlcompartment 11, and at Whichtme the valve -16 is, of course, closed. As the compartment is filled .with cream, the oat 34 rises and gradually operates the lever provided a lever 28 intermediately piv. .oted on a shiftable fulcrum. in the form .of a crank 29, ournaled inthe sides of the trou'gh -vaiythe amount of cream in the measuring compartment 11. Wfhen it is desired to i'll a cup with cream,

ythe same is placed under the receptacle 1() and said cup lifted to engage and litt the plate l22vvhich, acting through the stems 23, arms 2O and valve stem 19, opens the valve 16 and allows the cream in the compartment 11 to flowthrough the port 14 and into the cup held thereunder. After the cream in the measuring compartment 11 has all escaped into the cup held thereunder, said cup is low ered to release the plate 22 and permit the valve 16 to close partly under the action ot gravity and partly under the action of the spring 27 NViththe closing of the valve 16, the float 34'moves downy the valve stem 19 and again operates the lever 28 to open the valve 7 and alloWtheesca-pe ot cream-from the tank 4 toi the trough-12 through the ports 6 and again fill the measuring compartment 11 until stopped .b the Iolosingfof the valve 7 as the same-is lre eased: by the movement ofthe lever 28 under Ithe lifting action of the ioat 34.

The Vaction of 'ltlie non-drip valve 16 is highly important and in actual usage has overcome oneofthe primary objections to cream-dispensing devices now in use, which is the drippingl of cream during the intervals betvveenthe time cream is drawn from the dispensing device.` v

By making the under side of the valve 16 concave and terminating the same in a sharp annular edge 18, cream will not adhere to the bottom of saidA valve by capillary attraction, but will collect 0n said sharp annular edge. During the "closing movement of the valve 16 which is with a fast piston-like action due to the weight of saidvalve and the spring 27 a short blast of air is produced by the entrance of said valve into vthe port 14 that clears the Walls of said port, valve seat 15 and the valve 16 of any liquid thereon and shoots the same from said port and 'valve seat into the cup held thereunder, thus preventing dripping of the liquid after the valve 16 is closed. Any liquid on the valve 16 will quickly collect on its Sharpe ylindrical edge and will be easily shottherefrom into the cup.

-What I claim is:

1. In a liquid-dispensingA device; the combination With a compartment having a discharge port provided with a valve seat at its delivery end,zof a piston-like acting valve for engaging said seat and closing said port, and means for giving said valve, when open, a quick downward movement to produce a blast of air at the time said valve enters the discharge-port to-'clear the Walls of said port7 valve seat and valve from liquid and shoot the same from said port and valve seat.

2. The structure defined in claim l in which the lower end of the valve is recessed and terminates in a sharp edge.

3. In a liquid-dispensing device, the combination with a compartment having a discharge port, said discharge port having an internal contracted conical wall affording a valve seat at its delivery end, of a pistonlike acting valve having a conical lower end tor engaging said valve seat and closing the discharge port, and means for giving said valve7 when open, a quick downward movement to produce a blast of air at the time said valve enters the discharge port to clear the walls of said port, valve seat and valve from liquid and shoot the same from said port and valve seat.

4. The structure defined in claim 3 in which the lower end of said valve is recessed and terminates in a sharp edge.

5. The structure defined in claim 3 in which the lower end of said valve is recessed and terminates in a sharp edge, said sharp edge when the valve is closed being in substantially the same plane as the lower end oi said port.

6. A device of the class described compris-` ing a compartment having a discharge port provided with a valve seat and a piston-like acting valve for engaging the valve seat and closing the discharge port, said valve when open being under strain to close with a quick downward movement and produce a blast of air at the time said valve enters the discharge port to clear the walls of said port, and valve seat, the lower end of said valve having a sharp depending annular edge.

7. A device ol the class described compris ing a compartment having a discharge port the wall of which forms an inwardly and downwardly beveled valve seat, said wall forming with the exterior wall of the c0mpartment a sharp annular edge, and a valve for closing the port, having its lower end formed so as to rest on the valve seat and terminate in a sharp annular edge that is substantially aligned with the sharp edge of the valve seat when the valve is closed.

In testimony whereof I aliix my signature.

ALBERT SLATEN. 

